XenoPort Inc. shares (Nasdaq: XNPT) shares will be ones to watch for an early Wednesday volume spike. The company’s shares fell about 10 percent to about $19.50 after hours, after the company announced plans to sell 2.5 million shares, boosting its shares outstanding by about 9 percent.

One anecdotal market observation is that the market in recent months is seeing an increase in the number of stock offerings, especially among companies with the most at-risk balance sheets. — Mike Tarsala